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Increased microwave absorption property of porous Si3N4 ceramics by loading polymer-derived SiCN for a multifunctional design
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2023-04-13 , DOI: 10.1039/d3tc00834g
Daoyang Han 1 , Guiqin You 1 , Yi Zhang 1 , Huijie Tian 1 , Jilin He 1 , Junfang Liang 1 , Hailong Wang 1 , Chang-An Wang 2 , Rui Zhang 1, 3 , Gang Shao 1
Affiliation  

Ceramic materials with wave-transparent in-band and stealth out-off-band characteristics are rather urgent in the aerospace field. Porous Si3N4 ceramic, a wave-transparent material used to produce radomes and antenna windows, is considered to be one of the most promising ceramics for developing stealth-transmission-structure-integrated materials. If a functional phase with microwave absorption ability is loaded into porous Si3N4 ceramic, the resultant composite not only retains the mechanical strength of the Si3N4 ceramic, but also adds microwave absorption capability, laying the groundwork for the development of stealth-transmission-structure-integrated composite materials used in the radome field. Polymer-derived SiCN ceramics possess excellent composition designability and electromagnetic performance, along with low density and high-temperature resistance, which make it an ideal microwave-absorption phase in Si3N4 ceramic. This study employed porous Si3N4 ceramic as a support framework, which was loaded with SiCN to prepare a SiCN/Si3N4 multiphase ceramic, and the influence of the pyrolysis temperature on the microstructure and microwave absorption properties of as-fabricated SiCN/Si3N4 were investigated.

中文翻译:

通过加载聚合物衍生的 SiCN 提高多孔 Si3N4 陶瓷的微波吸收性能以实现多功能设计

具有带内透波和带外隐身特性的陶瓷材料在航空航天领域尤为迫切。多孔Si 3 N 4陶瓷是一种用于制造天线罩和天线窗的透波材料,被认为是开发隐身传输结构集成材料最有前途的陶瓷之一。如果将具有微波吸收能力的功能相加载到多孔 Si 3 N 4陶瓷中,所得复合材料不仅保留了 Si 3 N 4的机械强度陶瓷,还增加了微波吸收能力,为研制应用于天线罩领域的隐身-传输-结构一体化复合材料奠定了基础。聚合物衍生的SiCN陶瓷具有优异的成分可设计性和电磁性能,以及低密度和耐高温性,使其成为Si 3 N 4陶瓷理想的微波吸收相。本研究以多孔Si 3 N 4陶瓷为支撑骨架,负载SiCN制备SiCN/Si 3 N 4复相陶瓷,研究热解温度对制备的SiCN微观结构和吸波性能的影响/硅对3 N 4进行了调查。
更新日期:2023-04-13
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